NATIONAL STANDARD EXAMINATION IN BIOLOGY ... - Career Point

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BIOLOGY NSEB 2012-2012013 EXAMINATIONCAREER POINT15. Both, absorption and translocation of water are associated by this property of cell wall -(a) porosity (b) hydrophilic nature (c) mechanical strength (d) elasticityAns. [b]Sol. Cell wall have hydrophilic nature, plays most important role in absorption and translocation of water by a cell.16. Arrange the following animals in the order of increasing rate of heart beats.i. Sheep ii. Mouse iii. Rabbitiv. Horsev. Elephant(a) ii, i, iii, iv, v (b) v, iv, i, iii, ii (c) v, iv, ii, iii, i (d) i, iii, iv, v, iiAns. [b]Sol. In arm blooded animals the heart rate is inversely proportional to body size.17. Raj encountered a plant with thick, leathery, dark green leaves with prominent petioles; elongated, branched,prostrate stem and very long adventitious roots. From these adaptations, the plant seems to be -(a) a submerged plant (b) a marsh dweller (c) a shade loving plant (d) a sand binderAns. [d]Sol. All the given features are characters of succulent xerophytes.18. Consider the following hypothetical experiment. A definite number of eukaryotic cells were placed for 30minutes in some solutions and the result is depicted below -The solutions (i), (ii), (iii) and (iv) respectively most likely are -(a) nutrient medium, hypotonic medium, isotonic medium, hypertonic medium(b) hypotonic medium, hypertonic medium, isotonic medium, nutrient medium(c) isotonic medium, hypertonic medium, hypotonic medium, nutrient medium(d) hypertonic medium, hypotonic medium, nutrient medium, isotonic mediumAns. *Sol. All the 4 options are incorrect, the correct answer should bei. Isotonic solution ii. Isotonic solutioniii. Hypertonic solutioniv. Hypotonic solution19. Which of the following is expected to have a lining of stratified epithelium ?i. alveoli in lungs ii. oesophagus iii. duodenumiv. urinary bladder v. major arteries(a) ii, iv, and v (b) i, ii, iii and v (c) only ii (d) only ii and vAns. [a]Sol. Oesophagus lined by stratified squamous epithelium, urinary bladder lined by stratified transitionalepithelium and major arteries are also lined by stratified squamous epithelium.20. Forest fires are natural means of -i. secondary succession ii. elimination of predatorsiii. mineralization of nutrientsiv. discouraging primary consumption(a) i and iii (b) ii and iii (c) i, ii and iii (d) i, ii and vAns. [a]Sol. Forest fire will naturally responsible for secondary succession and mineralization of nutrients.CAREER POINT, CP Tower, Road No.1, IPIA, Kota (Raj.) Ph.: 0744-3040000Website : www.careerpointgroup.com, Email: info@careerpointgroup.com4 / 17
BIOLOGY NSEB 2012-2012013 EXAMINATIONCAREER POINT21. The figure depicts an eye defect and its correction. Select the most appropriate alternative from the followingthat best explains this.Ans.Sol.(a) Hypermetropia, convex lens of suitable focal length(b) Hypermetropia, concave lens of suitable focal length(c) Myopia, convex lens of suitable focal length(d) Myopia, concave lens of suitable focal length[d]According to diagram of question, concave lance is used which is used myopia eye defect.22. Which of the following sequences of mRNA will not translate completely ?(a) 5'AUG AAC UAA CCA CUC 3' (b) 5'AUG UUC AGC UCG UGA 3'(c) 5'AUG UUA CUC GCG UAA 3' (d) 5'AUG CCA UAC GAC UAG 3'Ans. [a]Sol. UAA stop codon is present in it.23. In living organisms, mucilage prevents damage to the underlying cells from either acidic or alkaline fluids incontact. This is due to which of the following properties of mucilage ?(a) Hydrophilic nature(b) Viscosity(c) Reducing properties of sugar residues (d) Amphoteric nature of protein componentAns. [d]24. In Galapagos Islands mountain peaks sustain populations of related species of snails. This is an example of -(a) genetic drift (b) gene flow (c) reproductive isolation (d) migrationAns. [c]25. Which of the following can be a reliable indication that the body fats are being consumed ?(a) Respiratory Quotient dipping below 1 (b) Rapid loss of body weight(c) Increased thirst(d) HypoglycemiaAns. [b]Sol. Body fat loss have maximum contribution in weight loss process.26. Antidiuretic hormone has the most abundant receptors in the kidneys of -(a) frogs in tropical pond(b) rabbits in a grass land(c) spotted deer in moist evergreen forest (d) kangaroo rats in desertsAns. [d]27. A bacterium-like cell was retrieved from space and on its analysis revealed the presence of biochemicalconstituents identical to those of eubacteria except for the presence of 33 types of amino acids. The codons tocode for them would be made of a minimum -(a) 3 deoxyribonucleotides(b) 2 deoxyribonucleotides(c) 4 deoxyribonucleotides(d) 5 deoxyribonucleotidesAns. [a]Sol. Total codon = (X) n X = Nitrogen base n = number= (4) 3 = 64 codon64 codon are sufficient for 33 amino acid.CAREER POINT, CP Tower, Road No.1, IPIA, Kota (Raj.) Ph.: 0744-3040000Website : www.careerpointgroup.com, Email: info@careerpointgroup.com5 / 17
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NATIONAL STANDARD EXAMINATION IN BIOLOGY ... - Career Point

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